docker-env-setup manual not work

[peng-yq]

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Issue Details

I attempted to install Nydus utilities using Docker by following the instructions in docs/docker-env-setup.md. However, I encountered several issues, likely due to the documentation being outdated. Most errors are related to files not being found.

1. Downloading the Nydus Snapshotter Release Tarball

   # Get the latest version. If this version does not work for you, you can try v0.6.0
   TAG=`curl -s https://api.github.com/repos/containerd/nydus-snapshotter/releases/latest | grep tag_name | cut -f4 -d "\""`
   wget https://github.com/containerd/nydus-snapshotter/releases/download/"$TAG"/nydus-snapshotter-"$TAG"-x86_64.tgz
   tar -xzvf nydus-snapshotter-"$TAG"-x86_64.tgz
   sudo install -D -m 755 nydus-snapshotter/containerd-nydus-grpc /usr/local/bin
   
   wget -O /etc/nydus/nydusd-config.json https://raw.githubusercontent.com/containerd/nydus-snapshotter/"$TAG"/misc/snapshotter/nydusd-config.fusedev.json
   wget -O /etc/nydus/config.toml https://raw.githubusercontent.com/containerd/nydus-snapshotter/"$TAG"/misc/snapshotter/config.toml
   

   • The file name nydus-snapshotter-"$TAG"-x86_64.tgz is incorrect; it should be nydus-snapshotter-"$TAG"-linux-amd64.tar.gz.
   • Extracting the tarball using tar -xvf results in a bin directory, which doesn't align with the subsequent commands and requires adjustments.
   • The commands to download configuration files fail with "/etc/nydus/: No such file or directory". The directory isn't created by running sudo install -D -m 755 nydus-snapshotter/containerd-nydus-grpc /usr/local/bin. It seems the base configuration isn't set up during installation.

2. Fetching the Latest Version of DragonflyOSS Image Service

   # Get the latest version. If this version does not work for you, you can try v2.1.4
   
   TAG=`curl -s https://api.github.com/repos/dragonflyoss/image-service/releases/latest | grep tag_name | cut -f4 -d "\""`
   wget https://github.com/dragonflyoss/image-service/releases/download/"$TAG"/nydus-static-"$TAG"-linux-amd64.tgz
   tar -xzvf nydus-static-"$TAG"-linux-amd64.tgz
   sudo install -D -m 755 nydus-static/* /usr/local/bin
   

   • The command to fetch the latest version tag (TAG=) does not retrieve the tag, preventing subsequent commands from executing.

I have only reached this point in the installation process, so I am unsure if additional issues exist. I recommend the author review the documentation, as it hasn't been updated in a while.